Just a personal opinion here, and forgive my poor ability to put it into words, and with proper punctuation. I think that nature, as it is ordered since original sin, has a certain pride and rebellion woven through it, such that to the godless perspective all of nature to a very great extent appears to explain it's own causality, as if nature makes and orders itself and everything in it logically, without the need for an intelligent designer having both created it all, and continually sustain it in existence, and granting effect to the various powers given to the laws of the natural world. This is observable anywhere I can think of, at least until the limits (of smallness, largeness, or time) are reached. Given this line of reasoning, I think it literally sensible and reasonable to conclude that studying the sky will show it's nature; that earth is a globe with a moon orbiting, a sun, planets, and stars, all of very great size and distance, and that each part has a role to play in the cause and effect of the various phenomena. It does not disprove or diminish God in any way, but it does leave open a means to be lead into doubt about God, and to be earthly and not lift one's mind to God. For lack of a better way of saying it, perhaps it would be too easy to believe and be saved if the earth was obviously flat, and if the heavens defied natural laws, though we can be sure that corrupt humanity, with the help of the devil, would find some way to excel at damnation.

I don't know if I followed your thought, but I think you are saying that the order inherent in a world created by God can be recognized, and though this order remains so seamless and ubiquitous despite the Fall, it lends itself now to the Godless assuming this order - taking it for granted, impressive system that it is - and not seeking its Creator? An interesting idea, if so, but it calls to mind the old conundrum, if a tree falls in a forest, and no one is around to hear it, does it make a sound? I would think that it takes a mind to appreciate Creation, so it is the fallen man who is proud when he revels in Creation, a slave to concupiscence and pride. I would almost advance the opposite, that Creation, since the Fall, has been humbled, polluted, and thus what would have been easy - the apprehension of God in His works - is now hard as man has first to transcend his suffering and trials to see nature as good and as coming from a Creator, and, in addition, must put in tedious observation and effort to figure out how things work.   

Thank you for the thought!